Pipe-coupling.



J. N. GOODALL.

PIPE COUPLING.

APPLICATION FILED SEPTA, 1908.

969,358, Patented Sept. 6, 1910.

w n 17109712277 W Johny Ga a/Caz UNITED STATES PATENT OFFICE.

JOHN N. GOODALL, OF PORTSINIOUTH, HAMPSHIRE. ASSIGNOR, BY MESNE AS- SIGNMENTS, '10 GOODALL MANUFACTURING COMPANY, A CORPORATION OF MAINE.

PIPE-COUPLING.

, Specification of Letters Patent.

Patented Sept. 6, 1910.

Application filed September 4, 1908. Serial No. 451,691.

To all whom it may concern:

Be it known that I, JOHN N. GoooALL, of Portsmouth, in the county of Rockingham and State of New Hampshire, have invented certain new and useful Improvements in Pipe-Couplings, of which the following is a specification.

This invention relates to improved long thread coupling devices for pipes which are intended to either conduct gas, air or steam, or to exclude water or other moisture. In the former instance, it is adapted for use in installing or repairing water. and other pipes, such as those employed for distributing water, gas, steam &c. in buildings. In the latter instance, it is also adapted for use in connection with conduits employed for inclos' electric conductors. In both instances, its application is the same, and it is employed to Join two sections of pipe in alinement, without necessitating extra coupling members such as unions, thimbles, etc. In this connection, reference may be had to U. S. Letters Patent No. 786,558, granted to me April 4, 1905, in which one at the sections of pipe to be joined requires an interiorly threaded couplin to be fitted thereto before it can...receive t e coupling.

Referrfl to the drawings forming a part of this specification,-Figure lrepresents an elevation of .a continuous pipe or conduit. Fig.2 represents ad'acent ends of two sections of pipe, provi ed with external taper screw-threads. Fig. 3 represents-the same, with a coupling device part1 in section attached to one pipe section. at represents an elevation of the two .pi sections joined by the coupling device. ig. 5 represents a longitudinal section of the latter. The same reference characters indicate the same parts wherever they occur. 1

Fig. 1 shows a continuous pipe or conduit 10, which may be severed on the dotted lines and the central ieoe thereof removed, if access to the inter or of the pipe is desired, or if an electric conductor contained therein requires re airs. In an event, the couplin device ereinazfter escribed is. adapte to bridge a gap between two sections of pipe 11 and 12, as shown b Fig. 2, and to join the adjacent ends so t at they may be made water tight without other means such as solder or red lead.

The ends of the pipe sections 11 and 12 are supplied with exterior taper-threads 13 vice therefor comprlses two members 15 and 16 which are connected by screw-threads and which are adapted to engage the screwthreads 13 and '14 respectively.- For convenience in manufacturlng, the two members 15 and 16 may be made as shownin Fig. 5 one with an external wrench fitting 17 which ma be shrunk or otherwise aflixed thereon, an the otherwith an interior bushing 18 likewise permanently afii'xed. Theexternal screw-thread of the member 15 is of uniform diameter between the collar 17 and the point 19, but of increasing diameter from the point 19 to the end 20. The internal threadof the member 16-is also of uniform diameter beand 14 of the same gage. The couplingde- I tween the bushing 18 and the point 21, but

adapted to turn freely, but, when the two tapering portions are brought together as shown m Fig. 5, they bind so as to produce awater-tight joint. The opposite end of the member 15 and the bushing 18 are formed with similar internal tapering threads 23 and 24, which are adapted to engage the threads 13 and 14 ofthe pipes to be coupled. All of the screw-threads are preferably inclined in the same direction.

.In applying the coupling, the two parts 15 and 16 are contracted, as shown in Fig. 3, when one member thereof is rewed upon one of the pipe sections. This oint having contracted as in Fig. 3, or extended as in *igs. 4 and 5. ,In the former instance, however, they are.

been made tight, the other member, .preferably the outer member 16, is turned so as to move it into engagement with the other pipe section. If the space between the two sections is determined with approximate accurac the bushi 18, when screwed upon that read 14, tig tens to the same degree as the cooperative taper threads of the members 15 and 16, thus tightening the three i the space between the ends of the two pipe sections 11 and 12, so -that the piping need not be shifted from the posit-ion occupied before the ipe 10 was cut to form said two sections. (gbviously, if either pipe section could be shifted longitudinally, any ordinary cou ling could be employed to connect them. o collapse the coupling to a length so that it can be slipped into the space between the ends of pipe sections 11, 12, it is only necessary to rotate one.- relatively to the other until the end 20 of member 15abuts the inner .end of bushing 18. Then the members can be rotated to engage them with the threaded portions of the pipe sections as shown in Fig. 5. coupling without disturbing the position of either pipe section, it is only necessary to collapse the coupling to its minimum length, and remove it bodily, by a lateral movement, the member 15 being then almost entirelycontained within the member 16.

As will be readily understood, it isof course desirable that there shall be no ma.- terial difiiculty in the o eration of effecting the complete joining; t at after one'mern ber, as member 15, has been screwed upon the pipe section 11, the other member 16 will stand in alinement with pipe sedtion 12 so as to insure the proper catching of the thread of section 12 and thus avoid spoiling the threads by crossing them. All threads are one way; I that is, all are right-hand threads in the drawing although, as is obvious, all might be left-hand threads.

All threads being out in the same direction, the operation of the device may be described as follows :The two members are collapsed until the inner end 20 of member 15 bears against the shoulder presented by the inner end of the bushin 18. As the latter is rigid with the barrel member 16, said member 16 can then be used as a handle to turn the tail piece or member 15 home on the tapered thread 13. Then whenthe bar rel member 16 is rotated backward while member 15 is held stationary, the first half of its longitudinal movement is in a straight line (in alinement with pipe section 12) because one end 22 of member 16 is traveling along a cylindrical or straight portion of member 15 while an internal cylindrical portion of member 16 is :traveling over the arger end 20 ofthe tapered portion of member 15, all as will be evident by comparing Figs. 3 and 5. This guided movement continues until the internal thread 24 takes To remove the thread 14 of pipe section 12, and so avoids liability of crossing and spoiling threads during the final movement of the barrel member to the position shown in Fig. 5.

As the barrel member 16 and tail piece member 15 are inseparably connected, neither member can become lost or mislaid when out of pipe-joining position. That is, both members must always remain in assembled condition ready for use.

A decided advantage in forming the two coupling members, so that they are under all conditions in screw-threaded engagement, lies in-the fact that when screwing onto the latter pipe section, it is not necessary to pick up at the same time the threads by which the coupling members are joined together.

The reason why, with this device, it is not necessary to use particular pains to pick up.

the threads is because the two members are provided with threaded portions which are always interengaged. somewhere along their length, no matter what may be the amount the distance between the 'pipe ends to be.

joined by said coupling, said members having continuously inter-engaged threaded portions, and each member having its outer end internally threaded for engagement with an externally threaded pipe end.

2. A collapsible coupling COIIIPIISIDg a barrel member and a tail piece member 1nseparably connected and collapsible to a length less than the distance between the pipe ends to, be joined by said coupling, the

tail piece member having its inner end tapered, and the barrel member hav ng its end which is in engagement withthe tail piece member, correspondingly tapered to engage the tapered threaded end of the tail piece member, the intermediate ortion of the barrel member being interna ly threaded to reserve engagement with the threads at the arger end of the tapered portion of the tail piece member.

3-. A collapsible pipe coupling the members of which are inseparably connected and capable of collapsing to a length to permit the cou lin to be inserted laterally between the en s 0 two pipe sections, the coupling being then extensible to join said pipe sections without varying the space between continuously inter-enga e them, said members bein provided with threaded por- E0515 and having interna y' threaded outer en s.

4. A ]pipe cou ling device comprising an interna y threa ed barrel member having a cylindrical portion-and a tapered portion,

and an externally threaded tail piece member having a cylindrical portion and a taperedport-ion, said members bein provided with continuously inter-engage; threaded portions to preserve 'their alinement when collapsed and while being extended. and having internally threaded outer ends.

5. A ipe cou ling device'compris ing an internal y threa ed barrel member having a cylindrical portion and a tapered portion,

. and an externally threaded tail piece member havinga cylindrical portion and a' tapered portion, said members having also tapered internally threaded end portions to engage pipe sections, said members bein provided with continuously inter-engage threaded portions to preserve the alinement of the members at all times.

engage pipe sections, said members havin co-acting abutting faces whereby the barre member may be utilized as a handle to screw the tail piece member on a pipe section.

7. A pipe cou ling, comprising inner and outer members ormed w1th screw threads for two opposed pipe sections, an external screw thread on sai inner member, and an internal screw thread formed in two sec external thread, and a relatively small section adjoining the lar er section and adapted to cooperate tightly with said external thread. Y 9. A 'pipe coupl' g com rising inner and outer members, an internal screw thread in the outer member including a section of relatively larger diameter, and a section of relatively small diameter, and an external taperingthread on the inner member whose major portion is adapted to cooperate freely with said larger section, and to cooperate tightly with said smaller section, and whose m nor portion is adapted to enter-the'smaller section when the major portionis'enga'ged with the larger section.

In testimony whereof I have aflixed my signature, in presence of two witnesses.

WILLIAM E. MARVIN, Lamas WATSON. 

